Talk:Nonlinear finite elements/Nonlinear axially loaded bar

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I think the second last equation is wrong, or at least I don't see how

I had the same thought after reading it. There should remain terms with squared, which makes it not possible anymore to write the DE as a matrix problem. This makes sense to me, since it is a nonlinear DE in the first place. I think it is wrong and should be corrected/removed. -- (discuss) 23:33, 10 September 2014 (UTC)[]
Thank you to all of you who pointed this out. The expression has been corrected. (discuss) 20:11, 31 August 2016 (UTC)[]